slightly related (i hope ....)

what about combining the std travel credits issued for ticket price fare drops with customer relations discount travel certs. i know the cust relations certs (pmo/dollarua) can't be combined with themselves (says so on the reverse) but again, wondering about combining with travel credits (s*/ual/travelvoucher) "treat as type b voucher". my take is yes as the re-price credits are the same as cash and not a discount but i'd love some clarification as i've got 3 cust relations certs ($150, $150 & $125) and $440 in re-price credits which i'd like to use